[glib] GVariant: add a clarification to the docs

[Ryan Lortie <ryanl src gnome org>]

commit 4d5fe2704834e5038aa7a05a54445336cff831b6
Author: Ryan Lortie <desrt desrt ca>
Date:   Tue Oct 4 17:27:27 2011 -0400

    GVariant: add a clarification to the docs
    
    Add a note to the doc for g_viarnat_get_child_value() that the return
    value is non-floating and must be freed with g_variant_unref().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=654412

 glib/gvariant-core.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/glib/gvariant-core.c b/glib/gvariant-core.c
index fab3a14..7e63acb 100644
--- a/glib/gvariant-core.c
+++ b/glib/gvariant-core.c
@@ -899,6 +899,9 @@ g_variant_n_children (GVariant *value)
  * It is an error if @index_ is greater than the number of child items
  * in the container.  See g_variant_n_children().
  *
+ * The returned value is never floating.  You should free it with
+ * g_variant_unref() when you're done with it.
+ *
  * This function is O(1).
  *
  * Since: 2.24